Hi,
do you mean something like https://www.easy-profile.com/support/dublepage-register.html#reply-11407 ?

I think so. And, I need each usertype to have their own profile fields. Going with the example provided, students would have an education goals field and teachers would have a research projects field. How is this done?

You can do this with conditions, for example a conditions on "usertype" field like:
1) if equal to custom value "teacher" then show fields "research projects",.....
2) if equal to custom value "teacher" then add to usergroup "Teacher"
3) if not equal to custom value "teacher" then add to usergroup "Student"

Also, the "Conference" group will have different field options.

Okay, so far I have created a new group in Joomla "Conference2020" with parent as "Registered"
Had Hikashop put people who have registered for the conference in the "Conference2020" group.
Created the "Usertype" Easyprofile filed as hidden type.
1. if equal to custom value "" (leave empty) show registered fields
2. if equal to custom value "conference2020" show Conference2020 fields

Is that correct so far?

The conference group should be listed in BOTH the registered and conference profile directories but the registered group should not be listed in the conference group.
"Registered" group in Joomla: Listed in the registered Easyprofile directory.
"Conference2020" group in Joomla: listed in both the registered and conference Easyprofile directories.

***Basically I am looking for:
The "Conference2020" Joomla Group to be able to choose if their profile is visible to the public, only the "Conference2020" group, on None.

The "Registered" Joomla Group keeps the ability to choose if their profile is visible to the public or not as they now do.

Sorry but one more thing.
The Conference2020 group will have additional fields beyond the Registered group. How I only allow those extra fields to show for the Conference2020 group?
Thank you and sorry for all the messages.

Sorry, I see how to make fields visible to a particular group. but I need help what the main question.

Sorry but from your multiple posts I did not recognize the main question, can you explain me better?

Hi,

However, the "Conference2020" group is not showing on the "Available For" dropdown option for fields.

"Available For" parameter works with Joomla ACL and not with Usergroups, so before set this parameter you need to create a Joomla ACL from Users->Access Levels.
You can create an ACL only for "Conference2020" user group and set the correct ACL for parameter "Available For"

I was thinking it was not showing b/c it is a child group. But if it is not a child of Registered it would be very difficult for me to set it's permissions.

Can you assist with this?

Hi,
You can simply create a ACL that contains only "Conference2020" group and set it as "Visible for" parameter in fields

"The "Conference2020" Joomla Group to be able to choose if their profile is visible to the public, only the "Conference2020" group, or private.

You can set User list to filter only users in some user group with the parameter called "Custom SQL Where", see examples at http://docs.easy-profile.com/index.php/article/sql-custom-where
Or show only members that have some specific value in some fields, for example you can have a field called "Do you want the profile available in lists?" (alias:available_in_list, options:Yes/No). With custom SQL Where you can set a static filter like available_in_list LIKE "Yes"

How do I allow the custom visibility profile of "Conference2020" to be the privacy option only for the "Conference2020" group?"

You can't manage this natively, "visibility profile" is valid and equal for all users. A way to manage this is to create a specific plugin like https://www.easy-profile.com/support/private-profiles-not-private.html#reply-26264

Unfortunately I does not understand well what's your goal because I think there is some misunderstanding about Joomla groups and ACLs, if "Conference2020" is a child of "Registered" then you will have that Conference2020 user group inherit ACL from registered user group, so for example all articles where the access is set to "Registered" will be accessible also for "Conference2020".

Can I hire someone on your staff to do this for me?

Hi,
sorry but we does not do custom works